Posted Feb 15, 2007 9:11 UTC (Thu) by ldo
In reply to: Linux botnets
Parent article: Linux botnets
I wrote a script which continually scanned /var/log/messages for "invalid user" entries logged by sshd, and did a
iptables --append INPUT --source srcaddr -j DROP
which was removed after 10 minutes. Most of the scanners never came back after the 10 minutes.
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